function Person(name) {
    this.name = name;
}

Person.prototype.sayName = function () {
    console.log(this.name);
};

Person.prototype.type = "human"; 

const p1 = new Person("Alice");
const p2 = new Person("Bob");

Object.setPrototypeOf(p1, { sayName() { console.log("Changed!"); } });  

p1.sayName(); // 输出?
p2.sayName(); // ?

console.log(p1.type); // ?
console.log(p2.type); // ?

console.log(p1.__proto__ === Person.prototype); // ?
console.log(p2.__proto__ === Person.prototype); // ?  